Note H - Components of Net Periodic Benefit Cost (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Qualified Pension Plan [Member]
Defined Benefit Plan, Minimum Employer Contributions, Fiscal Year	$ 0.3
Defined Benefit Plan, Plan Assets, Contributions by Employer	0.3
Restoration Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Benefits Paid	$ 1.3	$ 1.3